Lock



Feb. 17. 1925. l 1,526,625

M. BREAU ET A1.

LOCK

' Filed Dec. e, y1921 15 Fly' 3 I: `1.... fl/lll m 1.9

f M M,

Patented Feb. 17, 1925.

` MAURICE BIB/EAU AND GEORGES BEETHIER, OF CHATELLERAULT, FRANCE, AS-

SIGNORS TO BERNARD ROMAIN, OF PARIS, FRANCE.

Application led December 6, 1921.

To all whom t may concern:

Be it known that we, MAURICE BREAU and GEORGES BERTHIER, both citizensof the French Republic, residing, both, at Chatellerault, Vienne,France, the former at 12 Rue Saint-Jacques, the latter at 170 GrandeRue, have invented, a new and useful Improvement in Locks; and we dohereby declare the following to be a full, clear, and exact descriptionof the same..

This invention relates to a locking device enabling locking or blockingany movable organ, such as a clutch lever, or similar part, andapplicable also to doors, windows, drawers, and the like.

In order that the invention may be fully understood and readily carriedinto effect, a specific embodiment of the same will now be describedmore particularly, by way of example, reference being had to theaccompanying drawings, in which:

Figure 1 is a longitudinal elevation of the device.

Figure 2 is a plan-view, partially broken, of the latter.

Figure 3 is a side-view, partially broken, thereof,

Figures 4, 5, 6 and 8 illustrate certain details of constructionhereinafter referred to.

Figure 7 is a sectional view on line A-B of Fig. 6; and

Figure 9 is an end view of the key.

As shown in said drawings, this locking device consists of a casing 1having variable shape and dimensions, the side 2 of which is providedwith two apertures 3 and 4 allowing the passage of the locking-bolt. Twosuitable key-sleeves 5 and 6 are fastened. upon the plates 7 and 8 forenabling the insertion of a key 9. ln each of these sleeves 5 and 6 islocated a slotted part 10, Figs. 6 and 8, of suitable dimensions,provided with a variable number of wards 10, each said slotted partbeing permanently kept in its Vnormal position by a coil-or like spring11.

Between the two key-sleeves 10 is placed a worm 12 of suitable shape anddimensions, in both ends of which are provided two sockets 13 and 14.This worm 12 meshes `with a helically grooved nut 15 internally LOCK.

Serial No. 520,399.

From the above description the operation of the devic'e will be readilyunderstood.

The key 9, the end of which has pins 23, 24 to fit into sockets 13 and14 of the worm ends 12, is inserted into the keysleeve 5 or 6 by pushingit well up to the bottom, so that the slotted part 10 is Jforced inwardby projection 19 ot' the key (see Fig. 8), and presents itself with itswards opposite the grooves 20 of the stationary dovetailed member 20,thus permitting rotation of part 10, and of the key and worm 12.

The thrust of the slotted part 10 is terminated when the bearing 21 ofthe key abuts against the washer 22 of the sleeve. At this moment, thetwo pins 23, 24 of the key enter into the sockets 13, 14 of the worm 12.By rotating this worm by means or' the key, a rotary motion of the nut15 is obtained, which latter, being restrained from lateral motion bybracket 15, actuated the bolt 16 through the medium of its thread andthe internal thread 15 of the nut 15.

At each complete revolution, the slot oi' the slotted part 10 is broughtopposite wards 20 and tends to be pushed by the coil spring 11 to forceout the key. As a result, closing by a double or triple revolution, caremust be taken to maintain the key pushed up to the bottom in the closingdevice.

It must be understood that it is possible, without departing from thescope of the invention, to modify the pinions or the toothed wheels, tovary, when required, the lengths of the threaded parts and to increaseor decrease the number and the dimensions of the wards of the parts 10and 20. Moreover, it is obvious that the shape of the closing device andof the locking-bolt can be changed in very numerous manners, and thatthe key and its operating pins may be of any approved design.

Claims:

1, A lock, comprising a casing, a helically threaded lock bolt in thecasing, a threaded nut restrained for rotary motion only, and receivingthe threaded bolt, and having helical grooves on its outer periphery,and a key operated, helically threaded worm, in mesh with said nut.

2. A lock as in claim 1, said key operated worm having a key receivingsocket, there being an adj acently positioned key way, and a springpressed ward containing slotted cylinder and a Cooperating stationaryWard each side of the Worm, eaeh key Way conmemoer positioned in the keyWay, whereby taining cooperating Ward members. unauthorizedn'ianipulation of said look holt n testimony whereof, We have Signed out10 is prevented. names to Jchis specieaion.

3. A lock as in claim l, said key operated Worm havingkey receivingsockets onleaeh h/LURCE BREAU.

side thereof, and a key Way positioned on GEORGES BERTI-HER.

